Title:
SOUND ABSORPTION CHARACTERISTIC STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2012/008225
Kind Code:
A1
Abstract:
The present invention is capable of, even when external force that generates sound frequency is applied, absorbing noise generated thereby and preventing the noise from becoming a noise source for the surroundings thereof.
A sound absorption characteristic structure is provided with a surface layer (20) which has pores (21) formed in the surface (20A) thereof, and a porous layer (10) which has communication paths (24) communicating with the pores (21), and acoustic holes (14) each formed in the inner part deeper than the surface layer (20) in which the pores (21) are formed, communicating with the communication path (24), and having a larger volume than the volumes of the pore (21) formed in the surface (20A) and the communication path (24), and is given a sound absorption characteristic and/or a sound blocking characteristic by the pores (21) in the surface (20A), the communication paths (24) and the acoustic holes (14) in the porous layer (10). Consequently, sound absorption control including sound blocking in a predetermined sound frequency band becomes possible, and a high sound absorption characteristic can be given.
Inventors:
KAWAI, Junichi (1141-1 Okawagahara, Fujioka-Iino-cho, Toyota-sh, Aichi 92, 〒4700492, JP)
川合 淳一 (〒92 愛知県豊田市藤岡飯野町大川ヶ原１１４１番地１ アイシン化工株式会社内 Aichi, 〒4700492, JP)
MIHARA, Satoshi (1141-1 Okawagahara, Fujioka-Iino-cho, Toyota-sh, Aichi 92, 〒4700492, JP)
川合 淳一 (〒92 愛知県豊田市藤岡飯野町大川ヶ原１１４１番地１ アイシン化工株式会社内 Aichi, 〒4700492, JP)
MIHARA, Satoshi (1141-1 Okawagahara, Fujioka-Iino-cho, Toyota-sh, Aichi 92, 〒4700492, JP)
Application Number:
JP2011/061881
Publication Date:
January 19, 2012
Filing Date:
May 24, 2011
Export Citation:
Assignee:
AISIN KAKO KABUSHIKI KAISHA (1141-1, Okawagahara Fujioka-Iino-cho, Toyota-sh, Aichi 92, 〒4700492, JP)
アイシン化工株式会社 (〒92 愛知県豊田市藤岡飯野町大川ヶ原１１４１番地１ Aichi, 〒4700492, JP)
KAWAI, Junichi (1141-1 Okawagahara, Fujioka-Iino-cho, Toyota-sh, Aichi 92, 〒4700492, JP)
川合 淳一 (〒92 愛知県豊田市藤岡飯野町大川ヶ原１１４１番地１ アイシン化工株式会社内 Aichi, 〒4700492, JP)
アイシン化工株式会社 (〒92 愛知県豊田市藤岡飯野町大川ヶ原１１４１番地１ Aichi, 〒4700492, JP)
KAWAI, Junichi (1141-1 Okawagahara, Fujioka-Iino-cho, Toyota-sh, Aichi 92, 〒4700492, JP)
川合 淳一 (〒92 愛知県豊田市藤岡飯野町大川ヶ原１１４１番地１ アイシン化工株式会社内 Aichi, 〒4700492, JP)
International Classes:
G10K11/172
Attorney, Agent or Firm:
VESTA INTERNATIONAL PATENT OFFICE (5-6 Usa minami 3-chome, Gifu-shi Gifu, 67, 〒5008367, JP)
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